I just upgraded to 2.5G symmetric fiber and have a very odd problem where certain hosts are seeing slower upload speeds.
My topology is AT&T U-Verse BGW320-505 modem <---2.5G---> RB5009 <---10G DAC---> CRS328. From there I have various hosts on 1G and 10G (via DAC cables). These are all examples of speeds I get with Fast Path turned on:
- macOS getting ~1Gbps down and ~1Gbps up on gigabit
- Synology NAS getting ~2.2Gbps down and ~700Mbps up on 10G
- Synology NAS getting ~1Gbps down and ~700Mbps up on 1G
- macOS getting ~1Gbps down and ~1Gbps up on gigabit - SAME
- Synology NAS getting ~2.2Gbps down and ~2.2Gbps up on 10G <-- upload bandwidth fixed
- Synology NAS getting ~1Gbps down and ~1Gbps up on 1G <-- upload bandwidth fixed
Any ideas on why Fast Path would slow things down?